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04-16-2005, 02:50 PM
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#1 (permalink) |
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Registered User
Join Date: Jul 2004
Location: Rolling Hills Estates, CA
Posts: 130
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Just install Porterfield R4s and:
They aren't stopping as well as the OEM brakes. There is a slight hesitation before they grab except when slamming on the brakes. I would think they would be better right out of the box. Am I missing something or maybe the brakes needed to be bled after the install or maybe they need to be bedded in more. Only have about 10 miles on them but have stoped numerious times inbedding them. Did I do something wrong? Also the rear brake pad shield would work with the porterfield because they donn't have the depressions on the pads to secure the shield.
I'm going to Buttonwillow on the 25th and need to get the brake problem resolved, so any help would be appreciated. Dan |
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04-16-2005, 03:09 PM
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#2 (permalink) |
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Where's My Red Stapler
Join Date: Nov 2003
Location: Seattle, WA
Posts: 274
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My experience with the R4S is that they don't have the same initial bite as stock pads and appear to need just a bit of heat to work really well. Try stopping from 60 or so (safely!) and keep steady pressure on the brake pedal until you are almost stopped. You don't need to really stomp on the brakes, just a bit more agressively than normal; steady pressure is key. If you get progressively more stopping power then they probably just need a little heat in them.
I had the same initial reaction on my Miata but they are way better than stock with a bit of use. |
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04-16-2005, 03:11 PM
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#3 (permalink) |
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insert clever title here
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Some brakes need to heat up a bit to really bite, that may be your problem.
__________________
'05 Elise, Magnetic Blue / Biscuit / Hardtop / http://eliseinfo.com Radar detector mounting brackets for sale here |
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04-16-2005, 03:54 PM
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#4 (permalink) |
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Blame Canada, eh?
Join Date: Apr 2003
Location: Pgh, Pa
Posts: 2,261
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Give it more time to bed the pads in and get rid of the top layer of the pad that was exposed. 10 miles isn't enough - wait for 50-100 miles at least to get a real feel. EBC says something like 250 of normal useage.
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04-16-2005, 04:09 PM
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#5 (permalink) |
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Registered User
Join Date: Nov 2004
Location: Boston
Posts: 250
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Just had them installed?
How many days ago? Have they gone through a heat cycle? Look at the rotors... do you see that all of the pad area is making contact with the rotors? My first set up R4S took two track days to make good contact with the rotors (on a different car... floating calipers). 10 miles of use... are the wheels covered with brakes dust or do they look nice and clean? New pads on used rotors will take a little time. I wouldn't worry. Do some more high-speed bracking to bed them in.
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04-16-2005, 04:24 PM
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#6 (permalink) |
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Registered User
Join Date: Jul 2004
Location: Rolling Hills Estates, CA
Posts: 130
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Thanks for the responces. There still are lines on the rotors that haven't been ground off yet from the new pads. I'm going to do some light driving thru the hills to put some miles on the pads. I guess I need to put more miles on the new pads then I thought.
Dan |
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04-22-2005, 04:43 PM
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#9 (permalink) |
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Registered User
Join Date: Jul 2004
Location: Rolling Hills Estates, CA
Posts: 130
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Brake backing plates:
Has anyone who installed R4S's used the OEM backing plate. My backing plates had pop outs that fit into a depressed areas on the OEM pads to hold the plate in place. The porterfield's don't have those depressed areas so there was nothing to secure the plate's to, so I didn't put them on. The brakes rattle a bit without them.
Let me know what you have done. Thanks. Dan |
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04-23-2005, 10:07 AM
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#10 (permalink) |
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Registered User
Join Date: Nov 2004
Location: Boston
Posts: 250
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Those anti-rattle/squel plates don't go on aftermarket pads.
Different manufacturers could have slightly different backing plate sizes (well within tolerance... I talking 1mm) and shapes (usually at the bottom part of the backing plate). I have found my Porterfields to rattle a little more than other brands. As long as they don't squel, they are fine. Just put some high-quality anti-seize grease along the edges of the backing plates that come in contact with the calipers.
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